Verified answer
Can Xbox Play Anywhere be used on gaming handhelds?
Quick answer
Xbox describes supported gaming handhelds as part of the Play Anywhere device path for eligible Control Resonant purchases.
What this means
That does not guarantee performance on every handheld or create a native license for SteamOS devices. Hardware, Windows support, controls, and final optimization still determine usability.
Official source
Xbox Wire — supported device discussion
Continue with the relevant guide
Open the related Control Resonant guide for the current topic summary, connected systems, and any later verified changes.
This answer is reviewed against pre-release official information. It states unknown boundaries explicitly and will be revised when Remedy or a first-party store publishes a newer fact.